top quark definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Particle Physics a type of quark with a mass of c. 176 to 199 GeV/c, a positive charge that of an electron, zero charm, and zero strangeness
top quark definition by American Heritage Dictionary
noun Abbr. tThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A hypothetical quark with a charge of + 2/3 and a mass of 360,000 times that of the electron. See Table at subatomic particle.
top quark - Science Definition
A quark with a charge of +2/3. Its mass is larger than that of all the other quarks and is about 360,000 times that of the electron. See Table at subatomic particle.